Examining near-source effects in the far field

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A fundamental objective of the S-6 (physical basis for discrimination) sub-task of the CTBT R&D Seismic Monitoring Program at Los Alamos is to analyze the sensitivity of the regional signal to source configuration, material properties, geologic layering and structure, along with complications along the path of the signal. Our approach is to combine the results of conventional analysis of field data from explosions and earthquakes with results of numerical models of actual and idealized situations. Existing first-principles, finite difference codes allow us to examine source effects in the non-linear regime; linking the results of these near-source calculations to finite difference, ... continued below

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15 p.

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App, F.N.; Bos, R.J.; Dey, T.N.; Jones, E.M.; Kamm, J.R. & Taylor, S.R. September 1, 1995.

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Description

A fundamental objective of the S-6 (physical basis for discrimination) sub-task of the CTBT R&D Seismic Monitoring Program at Los Alamos is to analyze the sensitivity of the regional signal to source configuration, material properties, geologic layering and structure, along with complications along the path of the signal. Our approach is to combine the results of conventional analysis of field data from explosions and earthquakes with results of numerical models of actual and idealized situations. Existing first-principles, finite difference codes allow us to examine source effects in the non-linear regime; linking the results of these near-source calculations to finite difference, anelastic wave propagation codes allows us to examine the effect of various source region and propagation path characteristics on signals observed at regional distances. An investigation of discriminant differences for the DIVIDER and CORREO underground nuclear explosions is provided as an example of the approach used.

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15 p.

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OSTI as DE95016964

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  • 17. annual seismic research symposium on monitoring a comprehensive test ban treaty, Scottsdale, AZ (United States), 11-15 Sep 1995

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  • Other: DE95016964
  • Report No.: LA-UR--95-2639
  • Report No.: CONF-9509211--4
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 101057
  • Archival Resource Key: ark:/67531/metadc624620

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Office of Scientific & Technical Information Technical Reports

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  • September 1, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 25, 2016, 4:29 p.m.

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App, F.N.; Bos, R.J.; Dey, T.N.; Jones, E.M.; Kamm, J.R. & Taylor, S.R. Examining near-source effects in the far field, article, September 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc624620/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.